Improvement in looms



UNITED STATES PATENT OFFICEO a. w. ANDREWS, or sTAEEoRDvILLE, coNNEoTIoUT.

IMPROVEMENT IN LOOMS.

Specification forming part of Letters Patent No. 50,215, dated October 3, 1865.

To all whom it may concern:

Be it known that I, R. I/V. ANDREWS, of Staffordvlle, in the county of rlolland and State of Connecticut, have invented a new and usef'ul Improvement in Looms; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing, which forms a part of this specification.

The looms which have heretofore been constructed, without an exception, so far as my knowledge extends, can only be run at a limited rate of speed, for the reason that when a higher than the prescribed rate of speed is imparted to said looms it produces such sharp recoils of the picker-staffs (or their equivalents) as will throw the shuttles out of the shuttle-boxes.

The object of my present invention is to remedy the aforesaid objection, and this I do by such an arrangement of certain elastic frictionsurfaces, in connection either with the shuttleboxes or with the picker-staffs, (or their equivalents,) or with both the shuttle-boxes and the picker-staif`-, as will canse the said picker-staffs to be so gradually brought to the termination of their respective outward movements that there will not be any reaction or recoil at the termination of said movements, or, if any, not enough to throw the shuttles out of the shuttle-boxes.

In the accompanying drawing, on is a picker-staff, which is combined with thc vibrating frame A, B, C, C, and I), and may have the usual vibratory movements imparted to it by any of the Well-known methods.

The apparatus represented in the drawing for gradually arresting each outward movement of the picker-statil m consists of two elastic plates, It h, and the cast-metal holder t', the said spring-holder being of such a shape as to bring the outer ends ofthe elastic plates It It in contact with eachother, whileit retains the inner ends of said plates at such a distance from each other as to freely allow the pickerstaff to pass between them. The said springholder 'i is bolted to the under side of the shutile-box E in the manner represented in the drawing. It will therefore be perceived that each outward movement of the picker-staff will be gradually arrested by the increasing friction which will be exerted by the elastic plates It 7L upon the sides of said picker-staff, however violently it may be thrown between the converging sides of said plates; but it will readily be perceived that precisely the same eifect can be produced by the action of a single elastic friction-plate upon one side of a picker-staff at the same time that a counteracting polished surface is placed upon the opposite side of the picker-staff; or the said single elastic friction-plate may be combined with the shuttle-box in such a manner thatit will act upon the upper end of the picker-staff; or the said elastic friction-plate may be so arranged as to act upon a shoulder projecting from one side of the picker-staff; or the said elastic friction-plate may be so arranged as to act upon a curved elastic friction-plate secured to one side of the picker-staff.

The shuttle-box E is represented iu the accompanying drawing as being supplied with a rawhide picker-block, k, the said pickerbloclt being placed upon a rigid rod, j, which passes longitudinally over the shuttle-box, and which is secured in said position by means of the elevated heads o not' the shuttle-box, which receive the ends ot' the said rod. rlhe necessaryinward movements are imparted to thc said picker-block by means of thecordfand the auxiliary mechanism which is usually employed for effecting similar movements in other looms. Each outward movement of the said pickerblock k is gradually arrested bythe friction exerted npon the same by the elastic pressureplate g, which is combined with the shuttlebox E in such a lnanner that the friction which is exerted upon the picker-block by inward pressure of the said plat-e gwill steadily increase in force from the commencement to the termination of each outward movement of said block. The aforesaid friction pressureplate g may be so combined with the shuttlebox E as to cause it to act upon the top or either side of the picker-block 7c,- or two pressure-plates may be combined with the said shuttie-box in such a manner as to cause them to simultaneouslyact upon both sides of the picker-hlock k.

What I claim as my invention, and desire to secure by Letters Patent, is-

rlhe arrangement of one or more elastic friction-plates or their equivalents with the shuttle-boxes of looms in such a manner with relation to the picker-staffs or the picker-blocks of said looms as to produce the within-'described desirahle results, and in substantially the manner herein set forth.

R. W. ANDREWS. Witnesses:

D. F. AFAIRMAN, O. B. FAIRMAN. 

